Graphene oxide nanocomposites based room temperature gas sensors: A review

Thangamani, G.J.; Deshmukh, Kalim; Kovařík, Tomáš; Nambiraj, N. Arunai; Ponnamma, Deepalekshmi; Sadasivuni, Kishor Kumar; Khalil, H. P. S. Abdul; Pasha, S. K. Khadheer

doi:10.1016/j.chemosphere.2021.130641

Cited by 44 publications

(17 citation statements)

References 138 publications

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“…The oxygen-containing functional groups on the surface of GO are electron-withdrawing, promoting hole accumulation in the valence band and endowing GO with p-type nature . In air, oxygen molecules are adsorbed onto the surface of GO due to its high electronegativity, and then captured electrons from the conduction band of GO to form adsorbed oxygen (O 2 – ) and a hole accumulation layer at room temperature . When the foam was exposed to H 2 , H 2 acted as a donor of charges and released electrons to GO, leading to a thinner hole accumulation layer and an increase of resistance.…”

Section: Resultsmentioning

confidence: 99%

“…11 Among them, graphene oxide (GO) with a 2D "honeycomb" nanostructure presents abundant surface functional groups and a high surface-to-volume ratio for hydrogen adsorption/desorption at room temperature. 12 Also, the conductive nature of GO contributes to the charge transfer between surface-adsorbed oxygen species and the target gases, making it a promising candidate for hydrogen-sensing materials. 12−14 Further, a substrate integrated with H 2 -sensing materials may provide a possibility to address the tolerance against the adsorbing saturation of hydrogen and mechanical vibration.…”

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confidence: 99%

“…) and a hole accumulation layer at room temperature. 12 When the foam was exposed to H 2 , H 2 acted as a donor of charges and released electrons to GO, leading to a thinner hole accumulation layer and an increase of resistance. The involved reactions 1−3 are described as follows.…”

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confidence: 99%

“…Generally, hydrogen-sensing materials such as semiconducting metallic oxides, carbon-based materials, and two-dimensional (2D) transition dichalcogenides have been widely investigated . Among them, graphene oxide (GO) with a 2D “honeycomb” nanostructure presents abundant surface functional groups and a high surface-to-volume ratio for hydrogen adsorption/desorption at room temperature . Also, the conductive nature of GO contributes to the charge transfer between surface-adsorbed oxygen species and the target gases, making it a promising candidate for hydrogen-sensing materials. − …”

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confidence: 99%

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Lightweight Porous Polyurethane Foam Integrated with Graphene Oxide for Flexible and High-Concentration Hydrogen Sensing

Wang

Xing

et al. 2022

ACS Sens.

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Reliable detection of high-concentration hydrogen (H 2 ) leakage in sharp-vibration environments is highly desired such as in the application of space rockets. As hydrogen has to be detected simultaneously in a wide concentration range and at high concentrations (e.g., 100 v/v%) with outstanding linearity in response/concentration, lightweight features, and excellent tolerance against saturation and vibration, it remains challenging. Here, a flexible and highconcentration H 2 sensing has been developed through "dipping−drying" a threedimensional (3D) porous polyurethane (PU) foam integrated with graphene oxide (GO-PU). Multilayered honeycomb-structured graphene oxide appears to be tightly adhered to faveolate PU. Benefiting from the numerous adsorption sites of the "dual honeycomb" structure and abundant surface functional groups of GO, the GO-PU foam exhibits distinguished response and linearity toward 2−100 v/v% H 2 and shows excellent lightweight, tailorability, and flexibility. Remarkably, the foam possesses outstanding sensing stability against 0−180°bending and low 0−20% straining, along with outstanding H 2 sensing performance even after being pressed by a weight of 200 g, immersed in water, and frozen in a refrigerator at −10.8 °C. Practically, the GO-PU foam has potential for high-concentration H 2 leakage detection, and our synthetic strategy may provide a way to avoid adsorbing saturation in other flexible gas sensing.

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Section: Resultsmentioning

confidence: 99%

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confidence: 99%

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confidence: 99%

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confidence: 99%

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Lightweight Porous Polyurethane Foam Integrated with Graphene Oxide for Flexible and High-Concentration Hydrogen Sensing

Wang

Xing

et al. 2022

ACS Sens.

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“…The sensors have been categorized into four types, each differing from the ones in terms of the physicomechanical structure of graphene. The four categories of graphene are nanopowder [ 110 , 111 ], reduced graphene oxide (rGO) [ 112 , 113 ], nanoplatelets [ 114 , 115 ], and quantum dots [ 116 , 117 ]. Then, the challenges related to the current graphene/PDMS-based sensors have been highlighted, alongside some of their possible remedies.…”

Section: Introductionmentioning

confidence: 99%

Integration of Different Graphene Nanostructures with PDMS to Form Wearable Sensors

Zhang

Gao

et al. 2022

Nanomaterials

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This paper presents a substantial review of the fabrication and implementation of graphene-PDMS-based composites for wearable sensing applications. Graphene is a pivotal nanomaterial which is increasingly being used to develop multifunctional sensors due to their enhanced electrical, mechanical, and thermal characteristics. It has been able to generate devices with excellent performances in terms of sensitivity and longevity. Among the polymers, polydimethylsiloxane (PDMS) has been one of the most common ones that has been used in biomedical applications. Certain attributes, such as biocompatibility and the hydrophobic nature of PDMS, have led the researchers to conjugate it in graphene sensors as substrates or a polymer matrix. The use of these graphene/PDMS-based sensors for wearable sensing applications has been highlighted here. Different kinds of electrochemical and strain-sensing applications have been carried out to detect the physiological signals and parameters of the human body. These prototypes have been classified based on the physical nature of graphene used to formulate the sensors. Finally, the current challenges and future perspectives of these graphene/PDMS-based wearable sensors are explained in the final part of the paper.

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Dielectric properties of nano‐MMT and graphene quantum dots embedded poly (vinylidene fluoride‐co‐hexafluoropropylene) nanocomposite films

Kumar

Deshmukh

Kadlec

et al. 2023

J of Applied Polymer Sci

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In this work, montmorillonite (MMT) nanoclay and graphene quantum dots (GQDs) embedded poly (vinylidenefluoride-co-hexafluoropropylene) (PVDF-HFP) nanocomposite films were prepared using the solution-casting technique and characterized using Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), Scanning electron microscopy (SEM) and Atomic force microscopy (AFM). The thermal, mechanical and dielectric properties of PVDF-HFP/MMT/GQDs nanocomposite films were also investigated. The dielectric constant (ϵ 0 ), dielectric loss (ϵ 00 ) and conductivity (σ) of synthesized nanocomposite films were evaluated in the frequency and temperature range f100 Hz-1 MHz and 30-150 C, respectively. The highest ϵ 0 with relatively high ϵ 00 was achieved at low frequency for increasing temperature for all the nanocomposite films. The conductivity results showed good increment from lower to higher frequency up to 100 kHz at increasing temperature. The Cole-Cole plots represent the complex impedance of PVDF-HFP/MMT/GQDs nanocomposites at 150 C. The attained results imply that the PVDF-HFP/MMT/GQDs nanocomposite films can be useful candidates for flexible electronic devices.

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Graphene oxide nanocomposites based room temperature gas sensors: A review

Cited by 44 publications

References 138 publications

Lightweight Porous Polyurethane Foam Integrated with Graphene Oxide for Flexible and High-Concentration Hydrogen Sensing

Lightweight Porous Polyurethane Foam Integrated with Graphene Oxide for Flexible and High-Concentration Hydrogen Sensing

Integration of Different Graphene Nanostructures with PDMS to Form Wearable Sensors

Dielectric properties of nano‐MMT and graphene quantum dots embedded poly (vinylidene fluoride‐co‐hexafluoropropylene) nanocomposite films

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